I get the same error as Alphaoo1 posted above, so I thought replying here would be the best option.
I try to couple a Solid-Solver written with DUNE with OpenFoam and the 2d case works fine without further problems. Switching to 3d results in the mentioned errors from above with the same behavior of the coupling methods.
I already checked the meshes of fluid and solid, which both look fine to me (see picture). Also the coordinates that are given to preCICE of the coupling interface are correct.
I use preCICE-Version 2.1 and the fluid setup of the 3d fenics-openfoam testcase
(the one with the flap in the channel).
Has someone an idea for the solution of that problem ? Or at least where it could
come from ?